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Efficiencies, Thermodynamics and the By-Pass Engine

Published online by Cambridge University Press:  04 July 2016

N. le S. Filleul*
Affiliation:
Royal Military College of Science, Shrivenham

Extract

All too often, points dealing with some aspect or other of the thermodynamics of powerplants are made which are incomplete, ambiguous, erroneous, or a mixture of all three! The purpose of this note is to try to give a limited, but logical, theoretical analysis of one type of propulsion powerplant, namely the by-pass engine with the possibility of heat exchange between the by-pass air stream and the main gas stream before expansion through the propulsion nozzles. This is a problem to which the solution is not obvious, and which would probably present difficulties to the average student. Heat exchangers are perhaps more of hypothetical rather than practical interest at present, but it is important that a correct thermodynamic approach be made in every case. Nothing is less likely to be engineered than a Carnot engine, and the general line of argument should be of wider appeal than the particular example to which it is applied.

Type
Technical Notes
Copyright
Copyright © Royal Aeronautical Society 1963

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References

1.Mixing of Exhaust and By-pass Flow in a By-pass Engine. Pearson, H.. Journal of the Royal Aeronautical Society, Vol. 66, No. 620, August 1962.Google Scholar
2.Engineering Thermodynamics, Work and Heat Transfer. Rogers, G. F. C. and Mayhew, Y. R., Longmans.Google Scholar